Cimarron Uberti R/M Type II Arbor Question

[45 Dragoon]

I hear ya and thumbs are probably good enough with cowboy loads.
I've noticed the "endshake" measurement changes from "thumbs" only to a "smack" with a machinist hammer. No need to remove the barrel unless you're cleaning .  .  .  (probably have one then)
Endshake on my acp's is less than .002", can't get that number with just thumbs.